KR20200021656A - Expansion joint for road structure and construction method thereof - Google Patents

Abstract

An expansion joint for a road structure comprises: a joint gap formed between neighboring slabs of a road structure; a channel formed by cutting a pavement layer on the upper portion of the joint gap in a prescribed width; a backup agent made of an elastic material having prescribed elasticity to be inserted into the joint gap; a binder plug filled in the joint gap on the upper portion of the backup agent; a support plate which is installed on the bottom of the channel to close the upper portion of the joint gap, and has a width smaller than the width of the channel; a primer applied to the inner surface of the channel including the support plate in a prescribed thickness; an elastic mixture filled in the channel coated with the primer; and a finishing coating layer applied to the upper surface of the elastic mixture. The elastic mixture comprises 70-97 wt% of Indonesian natural asphalt and 3-30 wt% of a modifier composition. The modifier composition comprises a high-elasticity binder consisting of 10-200 parts by weight of an ethylene-vinyl-acetate polymer and 10-50 parts by weight of a petroleum resin with respect to 100 parts by weight of a styrene-butadiene-styrene block copolymer, and first-grade single-sized aggregate consisting of any one among basalt, sandstone, gabbro, and granite. The present invention greatly increases crack resistance and adhesion performance of the elastic mixture, improves plastic deformation resistance to effectively absorb tensile force and compressive force, to maximally suppress separation between the paved surface and the mixture, and minimizes plastic deformation caused by a vehicle weight to improve the durability and stability of the joint.

Description

Expansion joint for road structure and construction method

The present invention relates to stretch joints for road structures such as roads, bridges and underground roadways and construction methods thereof. More specifically, the present invention relates to high-elastic binders and first-grade binders using natural asphalt and SBS (styrene-butadiene-styrene copolymer) polymers. Expansion joints for road structures, which can significantly increase cracking resistance and adhesive performance by using single-grain aggregate mixtures, improve plastic deformation resistance, effectively absorb tensile and compressive forces, and minimize plastic deformation due to vehicle loads It is about a construction method.

As is well known, most roads, such as bridges, underground roads and open roads, consist of so-called asphalt pavements covered with concrete slabs with asphalt concrete for excellent durability and convenient maintenance while ensuring safe and smooth running of the vehicle.

These roads are partially cracked by various factors, such as repeated expansion and contraction with seasonal temperature changes, creep and dry shrinkage of concrete and floating settlement of the ground, uneven static and dynamic loads and stresses applied by the vehicle, and aging. Cracks will occur.

When rainwater, etc., penetrate the cracks of the road, the cracks become larger, resulting in a breakage of the road, which leads to enormous obstacles in the traffic of the road as well as causing a safety accident.

Accordingly, road structures such as bridges and underground roadways form joint gaps of predetermined intervals at regular intervals between the upper plates to accommodate expansion and contraction according to temperature changes, and adjacent to the portions disconnected by the joint gaps. It is common to install so-called telescopic joints to prevent foreign substances or rainwater from flowing into the interior between the two structures while interconnecting the top boards and flexibly coping with the contraction and expansion of the top boards to promote safe driving of the vehicle.

Stretch joints come in many types, for example, to form a channel with a certain width at the top of the joint gap to ensure smoothness while continuity of the joints, and to fill this channel with a mixture of asphalt sealant and aggregate. So-called asphalt plug joint type expansion joint technology was first introduced in US Patent No. 4,324,504 and widely used.

However, the flexible joints constructed with this technology do not effectively withstand the external shocks applied to the joint gaps, and the flexible joints are pushed into the joint gaps, resulting in breakage of the bridge deck and the collapse of the flexible joints. Breaking the bond between the aggregate and the binder eventually had a disadvantage of damage to the joint.

As a technique for overcoming these disadvantages, US Patent No. 5,024,554 and Korean Patent Registration No. 10-087557 have been disclosed. The above two technologies are similar to each other, and a metal plate such as a steel sheet or an aluminum plate is installed at the bottom of the channel above the joint gap and filled with asphalt sealant and aggregate mixture thereon to support and protect the flexible joint.

However, these conventional techniques are not easy to absorb the tensile and compressive forces due to the poor physical properties of the asphalt sealant itself used as a binder, such as crack resistance, elasticity and adhesiveness, not only cracking easily occurs due to live loads, but also paving surface There was a problem that the adhesive surface between the and the mixture is separated.

In addition, since the steel plate installed on the upper part of the joint gap is simply mounted without accompanying a separate fixing structure, the center of the steel plate is moved by repeated impacts by the vehicle, which causes the joint to be cracked, damaged, or collapsed in severe cases. There was a frequent problem of frequent problems.

United States Patent No. 4,324,504 United States Patent No. 5,024,554 Republic of Korea Patent No. 10-087557

The present invention was devised to solve the above-mentioned conventional problems, and the crack resistance and the adhesive performance of the binder and aggregate mixture filled in the channel in the joint gap are greatly increased, and the plastic deformation resistance is improved to improve the tensile and compressive forces. It is possible to effectively absorb, as well as to minimize the separation between the pavement and the mixture, and to minimize the plastic deformation caused by the vehicle load to expand the joints and construction methods for road structures that can improve the durability and stability of the joint The purpose is to provide.

Stretch joint for a road structure according to the present invention for achieving the above object, a joint gap formed between the neighboring slabs of the road structure; A channel formed by cutting the pavement layer above the joint gap to a predetermined width; A backup agent composed of an elastic material having predetermined elasticity and inserted into the joint gap; A binder plug filled in a joint gap on the backup agent; A support plate installed at the bottom of the channel to shield the joint gap top and having a width smaller than the width of the channel; A primer applied to the inner surface of the channel including the support plate at a predetermined thickness; An elastic mixture filled in the channel to which the primer is applied; And a finish coating layer applied to the upper surface of the elastic mixture.

The elastic mixture is composed of 70 to 97% by weight of Indonesian natural asphalt and 3 to 30% by weight of the modifier composition, wherein the modifier composition is 10 to 200 weight of ethylene-vinyl-acetate polymer based on 100 parts by weight of styrene-butadiene-styrene block copolymer. It is characterized by consisting of a high elastic binder consisting of 10 to 50 parts by weight and 10 to 100 parts by weight of petroleum resin and a viscosity modifier, and a first-grade single grain aggregate composed of any one of basalt, sandstone, gabbro and granite.

According to this preferred feature of the present invention, the elastic mixture is mixed at a ratio of 50 kg of high elastic binder and 170 kg of single-grained aggregate per 1 m 2 of the installation area, based on the installation thickness of 10 cm.

According to another preferred feature of the present invention, the primer is a high-elastic binder constituting the elastic mixture, and an amount of about 2.5 kg per 1 m 2 of coating area is applied at 2 mm or more.

According to another preferred feature of the invention, it may further include a fixing pin for fixing the support plate position.

In addition, there is provided a stretch joint construction method for a road structure according to the present invention for achieving the above object, the step of forming a channel having a predetermined width by cutting the pavement layer of the upper joint gap formed between the neighboring slabs; Removing and drying foreign substances such as dust present in the channel; Inserting a backup agent having a predetermined elasticity into the joint gap; Filling a high elastic binder plug having excellent waterproofness in a joint gap on the backup agent; Installing a support plate at the bottom of the channel above the joint gap; Applying a primer to a predetermined thickness on an inner surface of a channel including a support plate; It is composed of 70 to 97% by weight of Indonesia natural asphalt and 3 to 30% by weight of the modifier composition, wherein the modifier composition is based on 100 parts by weight of styrene-butadiene-styrene block copolymer and 10 to 200 parts by weight of ethylene-vinyl-acetate polymer and petroleum resin. A high-elastic binder consisting of 10 to 50 parts by weight and 10 to 100 parts by weight of a viscosity modifier, and a grade 1 single-grain aggregate composed of any one of basalt, sandstone, gabbro and granite were heated to 170 to 190 ° C. using an indirect heating stirrer. Laying the elastic mixture in the channel to which the primer is applied; Squeezing and solidifying the elastic mixture installed in the channel with a compactor; And after the surface temperature of the compacted elastic mixture is cooled to 100 to 150 ° C., performing a finish coating on the surface of the elastic mixture.

According to the expansion joint and construction method for the road structure according to the present invention, the binder constituting the elastic mixture adopts SBS polymer modifier as the main raw material of Indonesian natural asphalt, it is very excellent in shape retention power by securing sufficient rigidity as well as petroleum resin Since the adhesion is very excellent by using, the crack resistance and adhesion performance of the elastic mixture itself mixed with single grain aggregate is greatly increased, and the resistance to plastic deformation due to the vehicle load is greatly improved by interlocking the grade 1 single grain aggregate. .

Accordingly, it is possible to effectively absorb the tensile and compressive forces generated in the joint, and to minimize the separation phenomenon between the existing pavement surface and the elastic mixture, and to minimize the plastic deformation caused by the vehicle load, thereby significantly reducing the durability and stability of the joint. It can be improved.

In addition, the support plate is stably settled at the installation position above the joint gap, so that the support plate can be stably supported without being flown by the load of the traveling vehicle.

Therefore, the present invention has a great effect on the construction, safety and durability of the road construction expansion joint and cost down.

1 is a cross-sectional view showing a stretch joint for a road structure according to the present invention,
2 is a block diagram showing a method for constructing a stretch joint for a road structure according to the present invention;
3 is a cross-sectional view showing another embodiment of the flexible joint for a road structure according to the present invention.

Such specific features and other advantages of the stretch joint for a road structure and the construction method according to the present invention will become more apparent from the following description of the preferred embodiment with reference to the accompanying drawings.

In FIG. 1, the stretch joint 10 for a road structure according to the present invention is formed between two neighboring concrete slabs (hereinafter, abbreviated as "slab") in a road structure such as a bridge or an underground roadway, and thus, is subjected to a temperature change. It is installed in the joint gap 11 part which allows the expansion and contraction accordingly.

The telescopic joint 10 basically has a channel 12 with a predetermined width in an ascon pavement layer 2 (hereinafter abbreviated as "packaging layer") on the upper part of the joint gap 11 formed at regular intervals between the slabs 1. ) Is formed, and the inside of the channel 12 is filled with an elastic mixture 17 that can ensure the smooth running of the vehicle while allowing the stretching of the road.

Like the joint gap 11, the channel 12 is formed in the width direction of the road, and has a wider width than the joint gap 11.

The backup gap 13 is inserted into the joint gap 11 to prevent foreign substances, rainwater, and the like from penetrating. To this end, the backup agent 13 is composed of a high elastic elastic material having heat resistance because it should always be in close contact with the slab (1) during expansion and contraction of the slab (1).

In addition, a binder plug 14 having a predetermined elasticity and adhesive strength is filled in the joint gap 11 above the backup agent 12 so that the expansion joint 10 can establish more reliable watertight performance. The binder plug 14 may be any binder as long as it has a suitable elasticity and adhesive strength, but preferably, a highly elastic binder having excellent waterproof ability to constitute the elastic mixture 17 of the present invention may be used as described below.

A support plate 15 made of steel or aluminum covering the joint gap 11 is installed at the bottom of the channel 12 above the joint gap 11 filled with the binder plug 14. The support plate 15 effectively supports the load of the vehicle to prevent breakage of the elastic mixture 17 filled in the channel 12 into the joint gap 11 due to the vehicle load. The support plate 15 has a width smaller than the width of the channel 12 in consideration of the stretching of the road.

In addition, a primer 16, which is a kind of adhesive, is formed on the entire inner surface of the channel 12 including the support plate 15 so that the elastic mixture 17 filled thereon can be firmly attached to the slab 1 and the packaging layer 2. It is applied uniformly to a predetermined thickness. Preferably, an amount of about 2.5 kg per 1 m 2 of coating area may be uniformly applied to 2 mm or more.

The primer 16 can be used in various ways, it is preferable to use a high-elastic binder constituting the elastic mixture 17 to be described later for more stable and firm adhesion.

At this time, it may be more preferable that the primer 16 is also applied to the bottom surface of the channel 12 on which the support plate 15 is placed so as to prevent the flow of the support plate 15 and to securely fix it. (13) When filling the binder plug 14 in the upper joint gap 11 may be applied to the bottom of the channel 12 together.

The elastic mixture 17 is composed of a mixture of high elastic binder and first grade single grain aggregate. The binder is composed of 3 to 30 parts by weight of the modifier composition in 70 to 97 parts by weight of Indonesian natural asphalt in accordance with the features of the present invention. And the modifier composition is composed of 10 to 200 parts by weight of ethylene-vinyl-acetate polymer, 10 to 50 parts by weight of petroleum resin and 10 to 100 parts by weight of viscosity modifier with respect to 100 parts by weight of styrene-butadiene-styrene block copolymer.

Indonesian natural asphalt has a high elastic modulus at high temperature, so that resilience is improved even if a small amount of additive is added to enhance rigidity. Therefore, when a small amount of additive is added to improve rigidity, Together, excellent rigidity can be secured.

Styrene-butadiene-styrene (SBS) block copolymer functions to maintain the shape and adhesion of the elastic mixture 17 after construction, and has excellent resolving power as well as high resilience properties such as asphalt softening point. good.

Ethylene-vinyl-acetate polymer greatly improves the adhesive strength of the binder, and petroleum resin not only increases the viscosity of the binder, but also improves the high temperature properties and imparts adhesive properties to improve the adhesive strength, as well as cracking at low temperatures below 20 ° C. Prevents brittle fracture.

These petroleum resins include 10 to 50 parts by weight. When the petroleum resin is less than 10 parts by weight, the adhesive strength is lowered, thereby lowering the crack resistance and the adhesive performance of the elastic mixture itself mixed with the single grain aggregate.

When the petroleum resin exceeds 50 parts by weight, the adhesive strength is not greatly improved, so that the crack resistance and the adhesive performance of the elastic mixture itself mixed with the single grain aggregate are not greatly increased, while the manufacturing cost is increased. Therefore, the petroleum resin is most preferably mixed at about 10 to 50 parts by weight.

Oils such as copper and vegetable oils may be used as the viscosity modifier, and the viscosity is reduced when the binder composition is heated, thereby improving workability and preventing a rapid decrease in viscosity change at high temperatures. In addition, the shape holding force may not be maintained even after construction.

And single grain aggregate may be made of any one of basalt, sandstone, ban rock and granite, it is preferable that the granules of 14 ~ 20㎜ particle size.

Such an elastic mixture 17 of the present invention is preferably heated to about 170 ~ 190 ℃ by an indirect heating stirrer and installed in the channel 12, wherein the installation area 1㎡ based on the installation thickness 10cm It is preferable that the binder is laid at a ratio of 50 kg of sugar binder and 170 kg of single grain aggregate.

On the other hand, on the surface of the elastic mixture 17, which is installed and compacted in the channel 12, the finish coating layer 18 for enhancing the waterproofing ability while improving the adhesion with the packaging layer 2 so as to partially invade the packaging layer (2). Is formed.

Therefore, the expansion joint 10 of the present invention can significantly absorb the tensile and compressive forces in the expansion joint 10 by improving the plastic deformation resistance while significantly increasing the crack resistance and the adhesive performance of the elastic mixture (17) In addition, the separation between the pavement layer 2 and the elastic mixture 17 can be suppressed as much as possible, and the rigidity of the single-integrated aggregates is firmly adhered to minimize plastic deformation due to the vehicle load. It can greatly improve.

Next, the construction method of the flexible joint 10 for a road structure according to the present invention having such structural features will be described in parallel with FIG. 3.

In step 100, the pavement layer 2 is cut at regular intervals using a rod cut, and the pavement layer 2 cut with a small breaker or water hammer or the like is destroyed. The channel 12 having a predetermined width is formed on the joint gap 11 between the slabs 1 by removing the broken pavement layer 2.

Next, in step 110, after removing the lattices, dust, oils, and the like in the channel 12 by using a shot blast, a blower, or a water cleaning machine to exert sufficient adhesive force and prevent peeling, the torch Dry thoroughly using the back.

Subsequently, in step 120, a highly elastic backup agent 13 having heat resistance is inserted into the joint gap 11 between the slabs 1, and in step 130, the joint gap above the backup agent 13. The binder plug 14 is filled in 11 using an injector (not shown).

The binder plug 14 may be formed by filling the high-elastic binder constituting the elastic mixture 17 disposed in the channel 12. In this case, the binder plug 14 may have excellent crack resistance and adhesion as well as excellent waterproofing ability. It is better to improve the durability and stability of the joint 10.

Next, in step 140, the support plate 15 is placed on the bottom of the channel 12 above the joint gap 11 filled with the binder plug 14, and in step 150, the channel including the support plate 15 is placed. The primer 16 which is an adhesive agent is apply | coated to the whole inner surface of (12) to predetermined thickness.

Like the binder plug 14, the primer 16 is also preferably used a high-elastic binder constituting the elastic mixture 17, and uniformly applying an amount of about 2.5 kg per square meter of coating area to 2 mm or more. desirable.

At this time, the primer 16 is preferably applied to the bottom of the channel 12 on which the support plate 15 is placed for more stable fixing of the support plate 15. In this case, the filling step of the bypass plug 14 described above ( 140 may be applied simultaneously.

Next, in step 160, 70-97 parts by weight of Indonesian natural asphalt in an indirect heating type stirrer, 10-200 parts by weight of ethylene-vinyl-acetate polymer and 100 parts by weight of styrene-butadiene-styrene block copolymer A binder composition consisting of 3 to 30 parts by weight of a modifier composition consisting of 10 to 50 parts by weight of a resin and a 10 to 100 parts by weight of a viscosity modifier and a grade 1 single-grained aggregate having a particle size of 14 to 20 mm are placed at a predetermined temperature, preferably 170 to 190 ° C. By heating with a melt to melt the binder composition, the elastic mixture 17 which is evenly mixed with the binder and single grain aggregate is installed in the channel 12 to which the primer 16 is applied.

At this time, the elastic mixture 17 to be installed is installed at a ratio of 50 kg of binder per 1 m 2 of the installation area, 170 kg of single-grained aggregate based on the installation thickness 10 cm.

Next, in step 170, the elastic mixture 17 embedded in the channel 12 is firmly compacted using, for example, a tantem roller or the like.

Here, the elastic mixture installation step 160 and the compaction step 170 may be preferably repeated several times at an appropriate thickness rather than proceeding in one operation.

Next, in step 180, the finish coating agent is applied to include the surface of the elastic mixture 17 and a part of the packaging layer 2 while the surface temperature of the compacted elastic mixture 17 is sufficiently cooled to approximately 100 to 150 ° C. By completing the coating layer 18 to complete the installation of the expansion joint 10.

On the other hand, Figure 2 is shown another embodiment of the flexible joint 10 for a road structure according to the present invention, this embodiment has the same configuration except for a part of the configuration of the above-described embodiment, for convenience in the corresponding parts The same reference numerals will be used and redundant descriptions will be omitted.

This embodiment further includes a fixing pin 19 in which the supporting plate 15 can be reliably fixed to the bottom of the channel 12 above the joint gap 11 without any flow in the configuration of the above-described embodiment.

Accordingly, the support plate 15 can be more reliably and stably positioned by the fixing pins 19 together with the primers 16, thereby facilitating the construction and preventing the flow due to the vehicle load even after construction. The cracks and breaks in (17) can be suppressed as much as possible.

On the other hand, the support plate 15 may be made of a metal material, the anti-corrosion coating layer may be applied to the surface of the support plate 15 to prevent corrosion of the metal surface. The coating material of this anti-corrosion coating layer is 20% by weight of metcaptotriazole, 15% by weight of petroleum sulfonate, 10% by weight of mercaptobenzothiazole, 15% by weight of hafnium, 10% by weight of molybdenum emulsion (MoS2), and oxidation It is composed of 30% by weight of aluminum, the coating thickness can be formed to 8㎛.

Metcaptotriazole, petroleum sulfonate and mercaptobenzothiazole serve as corrosion protection and discoloration prevention.

Hafnium is a corrosion-resistant transition metal element that serves to have excellent water resistance and corrosion resistance.

Molybdenum emulsion plays a role of imparting slidability and lubricity to the surface of the coating film.

Aluminum oxide is added for the purpose of fire resistance, chemical stability, and the like.

The reason for limiting the numerical value of the ratio and the coating thickness of the components as described above, the inventors analyzed through the test results several times, showed the optimum anti-corrosion effect at the ratio.

In addition, the antifouling coating layer made of the antifouling coating composition may be applied to the circumference of the support plate 15 so as to effectively prevent the attachment and removal of the contaminants.

The antifouling coating composition includes an alkylate polyglucoside and an aminoalkyl slovetane in a 1: 0.01 to 1: 2 molar ratio, and the total content of the alkylate polyglucoside and the aminoalkyl slovetane is 1 to 10 based on the total aqueous solution. Weight percent.

The alkylate polyglucoside and aminoalkyl slovesteine is preferably 1: 0.01 to 1: 2 as the molar ratio. When the molar ratio is out of the above range, the coating property of the substrate is decreased or the moisture adsorption of the surface after application increases, thereby removing the coating film. There is a problem.

The alkylate polyglucoside and aminoalkyl slovesteine is 1 ~ 10% by weight of the total composition aqueous solution is preferred, if less than 1% by weight has a problem that the coating property of the substrate is lowered, if it exceeds 10% by weight increase the coating film thickness Precipitation is likely to occur.

On the other hand, it is preferable to apply | coat by the spray method as a method of apply | coating this antifouling coating composition around the support plate 15. In addition, the final coating film thickness around the support plate 15 is preferably 500 to 2000 kPa, more preferably 1000 to 2000 kPa. If the thickness of the coating film is less than 500 GPa, there is a problem of deterioration in the case of high temperature heat treatment, and if it is more than 2000 GPa, there is a disadvantage that crystal precipitation of the coating surface is likely to occur.

In addition, the present antifouling coating composition may be prepared by adding 0.1 mole of alkylate polyglucoside and 0.05 mole of aminoalkyl slovetane to 1000 ml of distilled water and then stirring.

In addition, the channel 12 may be coated with a fragrance material mixed with functional oils, and thus, the channel 12 may be sterilized, and the worker 12 may be relieved during transport and construction of the channel 12.

The fragrance material may be mixed with a functional oil, and the mixing ratio of the fragrance material is 95 to 97% by weight of the functional oil is mixed with 3 to 5% by weight of the functional oil, and the functional oil is decata dealcaca oil (Acacia dealbata oil) 50 Weight percent and 50 weight percent Valeriana fauriei oil.

The functional oil is preferably mixed with 3-5% by weight based on the perfume material. When the mixing ratio of the functional oil is less than 3% by weight, the effect is insignificant, and when the mixing ratio of the functional oil exceeds 3 to 5% by weight, the function thereof is not greatly improved while the manufacturing cost is greatly increased.

The main chemicals of Acacia dealbata oil are palmic aldehyde, enanthic acid, etc., with good fragrance and good effect on bactericidal, antidepressant and stress relief.

Valeriana fauriei oil (Valeriana fauriei oil) is the main chemicals such as bornyl acetate, pinene, etc., and it acts to reduce the blood pressure and calm and calm the mind, so it has an excellent effect on anxiety and relaxation.

Since the functional oil is coated on the channel 12, not only can the channel 12 be sterilized, but also helps the worker to recover from fatigue during transportation and construction of the channel 12.

In addition, the elastic modifier may be further mixed into the high elastic binder, and 10 parts by weight of the elastic modifier is mixed with 90 parts by weight of the high elastic binder.

The elasticity enhancer mixed with 10 parts by weight of a high elastic binder is made of rubber, carbon black, antioxidant, and sulfur, and the mixing ratio thereof is 60% by weight of rubber, 33-36% by weight of carbon black, antioxidant 2 5 weight% and 1-3 weight% of sulfur which are accelerators are mixed.

Carbon black is added to increase the wear resistance, but if the content is less than 33% by weight, the elasticity and wear resistance is reduced, if the content exceeds 36% by weight, the rubber content of the main component is relatively small, there is a fear that the elastic force is lowered , 33 to 36% by weight.

Antioxidants add 2 to 5% by weight by selecting 3C (N-PHENYL-N'-ISOPROPYL-P-PHENYLENEDIAMINE) or RD (POLYMERIZED 2,2,4-TRIMETHYL-1,2-DIHYDROQUINOLINE) If it is less than% by weight, the product is easy to oxidize, and if it is added too much and exceeds 5% by weight, the content of rubber, which is a main ingredient, may be relatively low, which may lower the elastic force. ~ 5% by weight is appropriate.

Sulfur, an accelerator, is mixed with 1-3 wt%. Less than 1% by weight is a slight vulcanization effect in the heating step during molding, so 1% by weight or more is added. If the content exceeds 3% by weight, the rubber content of the main component may be relatively low, and the elastic force may drop. Therefore, 1 to 3% by weight is appropriate.

Therefore, in the present invention, the elasticity enhancer having elasticity in various directions is further mixed with the high elastic binder, thereby increasing elasticity, toughness and rigidity, thereby improving durability, thereby improving performance of the elastic joint.

1: slab 2: pavement layer
10: expansion joint 11: joint gap
12: channel 13: backup agent
14: binder plug 15; Support plate
16: primer 17: elastic mixture
18: finish coating layer 19: fixing pin

Claims (4)

A joint gap formed between neighboring slabs of the road structure;
A channel formed by cutting the paving layer on the joint gap to a predetermined width;
A backup agent composed of an elastic material having predetermined elasticity and inserted into the joint gap;
A binder plug filled in the joint gap on the backup agent;
A support plate installed at a bottom of the channel to shield an upper portion of the joint gap and having a width smaller than that of the channel;
A primer applied to an inner surface of the channel including the support plate at a predetermined thickness;
An elastic mixture filled in the channel to which the primer is applied; And
Including; finish coating layer applied to the upper surface of the elastic mixture;
The elastic mixture is composed of 70 to 97% by weight of Indonesian natural asphalt and 3 to 30% by weight of the modifier composition, wherein the modifier composition is based on 100 parts by weight of styrene-butadiene-styrene block copolymer 10 to ethylene-vinyl acetate polymer. For road structures comprising a high elastic binder consisting of 200 parts by weight, 10-50 parts by weight of petroleum resin and 10-100 parts by weight of viscosity modifier, and a first-class single grain aggregate composed of any one of basalt, sandstone, gabbro and granite. Telescopic joint.
The method according to claim 1,
The elastic mixture is mixed at a ratio of 50 kg of high-elastic binder and 170 kg of single-grained aggregates per 1 m 2 of the laying area, based on the laying thickness of 10 cm;
The primer is a high-strength binder constituting the elastic mixture, the stretch joint for road structures, characterized in that the amount of about 2.5kg per square meter of coating area is applied in 2mm or more.
The method according to any one of claims 1 to 3,
Stretch joint for the road structure further comprises a fixing pin for fixing the support plate.
Cutting a pavement layer over the joint gap formed between neighboring slabs to form a channel having a predetermined width;
Removing and drying foreign substances such as dust existing in the channel;
Inserting a backup agent having a predetermined elasticity into the joint gap;
Filling a high elastic binder plug having excellent waterproofness in the joint gap on the backup agent;
Installing a support plate on the bottom of the channel above the joint gap;
Applying a primer to a predetermined thickness on an inner surface of the channel including the support plate;
It is composed of 70 to 97% by weight of Indonesia natural asphalt and 3 to 30% by weight of the modifier composition, wherein the modifier composition is 10 to 200 parts by weight of ethylene-vinyl-acetate polymer and 100 parts by weight of styrene-butadiene-styrene block copolymer A high-elastic binder consisting of 10 to 50 parts by weight of resin and 10 to 100 parts by weight of viscosity modifier, and a grade 1 single-grain aggregate consisting of basalt, sandstone, gabbro, and granite are heated to 170 to 190 ° C. using an indirect heating stirrer. Laying an elastic mixture in the channel to which the primer is applied;
Stiffening the elastic mixture installed in the channel with a compactor; And
And after the surface temperature of the compacted elastic mixture is cooled to 100 to 150 ° C., performing a finish coating on the surface of the elastic mixture.

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